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本文研究了一定成分(1.2%C,1.55%Si,0.6%Mn,0.04%S,0.03%P)的石墨钢在铸态及不同规范热处理后的耐磨粒磨损性能。结果指出,铸态的耐磨性最低;正火和780℃退火后870℃加热再150℃等温淬火的最耐磨.超过了经淬火及200℃回火的常用犁铧钢65Mn。150℃及200℃等温淬火后,具有最高的硬度(HRC62～63);而综合机械性能以300℃等温淬火为最好。根据金相组织和硬度值,论述了基体组织及硬度对钢的耐磨性的影响。证实了组织中有一定量残余奥氏体存在时,虽然降低了硬度,却提高了钢的耐磨性。
In this paper, we study the wear resistance of a certain composition of graphite (1.2% C, 1.55% Si, 0.6% Mn, 0.04% S, 0.03% P) after as-cast and different canonical heat treatment. The results showed that the as-cast wear resistance of the lowest; normalizing and 780 ℃ after annealing at 870 ℃ and then isothermal quenching of the most wear-resistant 150 ° C. More than quenched and tempered 200 ℃ temper common Plowshares steel 65Mn. After being isothermal quenched at 150 ℃ and 200 ℃, HRC has the highest hardness (HRC62 ~ 63); while the overall mechanical properties are the best at 300 ℃. According to microstructure and hardness value, the effect of matrix structure and hardness on the wear resistance of steel was discussed. Confirmed the existence of a certain amount of residual austenite in the organization, although reducing the hardness, but increased wear resistance of steel.